according to a senior defense official, defense secretary chuck hagel, had a it telephone conversation with his counterpart today. we're still waiting to get details about what specifically was said during that conversation. but, of course, the white house monitoring the situation quite closely, in consultation with its partners abroad. for days, the administration has been warning russia against intervening in ukraine. of course, on friday, it was clear that that diplomatic strategy had failed, so president obama came out with a strong warning to russia not to ramp this up any further. he said there would be costs. here's a little bit more of what he had to say. take a listen. >> throughout this crisis, we have been very clear about one fundamental principle. the ukrainian people deserve the opportunity to determine their own future. together with our european allies, we have urged an end to the violence, and encouraged ukrainians to pursue a course in which they stabilize their country, forge a broad based government and move to elections this spring. >> reporter: so the president wa